Front Cover: Photooxidation of Fulvenes in a Continuous Flow Photoreactor using Carbon Dioxide as a Solvent (ChemPhotoChem 7/2018)

ChemPhotoChem ◽  
2018 ◽  
Vol 2 (7) ◽  
pp. 507-507
Author(s):  
Lingqiao Wu ◽  
Darren S. Lee ◽  
Hamza Boufroura ◽  
Martyn Poliakoff ◽  
Michael W. George
Keyword(s):  
Carbon Dioxide ◽  
Continuous Flow ◽  
Front Cover

scholarly journals Continuous-flow Heck synthesis of 4-methoxybiphenyl and methyl 4-methoxycinnamate in supercritical carbon dioxide expanded solvent solutions

2013 ◽  
Vol 9 ◽  
pp. 2886-2897 ◽  
Author(s):  
Phei Li Lau ◽  
Ray W K Allen ◽  
Peter Styring
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Methyl Acrylate ◽  
Heck Reaction ◽  
Continuous Flow ◽  
Flow Reactor ◽  
Product Distribution ◽  
Internal Diameter ◽  
Palladium Metal ◽  
Supercritical Carbon

The palladium metal catalysed Heck reaction of 4-iodoanisole with styrene or methyl acrylate has been studied in a continuous plug flow reactor (PFR) using supercritical carbon dioxide (scCO2) as the solvent, with THF and methanol as modifiers. The catalyst was 2% palladium on silica and the base was diisopropylethylamine due to its solubility in the reaction solvent. No phosphine co-catalysts were used so the work-up procedure was simplified and the green credentials of the reaction were enhanced. The reactions were studied as a function of temperature, pressure and flow rate and in the case of the reaction with styrene compared against a standard, stirred autoclave reaction. Conversion was determined and, in the case of the reaction with styrene, the isomeric product distribution was monitored by GC. In the case of the reaction with methyl acrylate the reactor was scaled from a 1.0 mm to 3.9 mm internal diameter and the conversion and turnover frequency determined. The results show that the Heck reaction can be effectively performed in scCO2 under continuous flow conditions with a palladium metal, phosphine-free catalyst, but care must be taken when selecting the reaction temperature in order to ensure the appropriate isomer distribution is achieved. Higher reaction temperatures were found to enhance formation of the branched terminal alkene isomer as opposed to the linear trans-isomer.

ChemInform Abstract: Diaryl Ether Synthesis in Supercritical Carbon Dioxide in Batch and Continuous Flow Modes.

ChemInform ◽  
2009 ◽  
Vol 40 (8) ◽  
Author(s):  
Jin-Kyun Lee ◽  
Matthew J. Fuchter ◽  
Rachel M. Williamson ◽  
Gary A. Leeke ◽  
Edward J. Bush ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Continuous Flow ◽  
Diaryl Ether ◽  
Ether Synthesis ◽  
Supercritical Carbon

Synthesis of cyclic organic carbonates via catalytic oxidative carboxylation of olefins in flow reactors

2017 ◽  
Vol 7 (1) ◽  
pp. 84-89 ◽  
Author(s):  
Ajay A. Sathe ◽  
Anirudh M. K. Nambiar ◽  
Robert M. Rioux
Keyword(s):  
Carbon Dioxide ◽  
Continuous Flow ◽  
Catalytic Conversion ◽  
Cyclic Carbonates ◽  
Flow Reactors ◽  
Organic Carbonates ◽  
Continuous Flow Reactors

The direct catalytic conversion of olefins into cyclic carbonates using peroxide and carbon dioxide is demonstrated using continuous flow reactors.

Continuous Flow Synthesis of Ketones from Carbon Dioxide and Organolithium or Grignard Reagents

2014 ◽  
Vol 126 (32) ◽  
pp. 8556-8560 ◽  
Author(s):  
Jie Wu ◽  
Xiaoqing Yang ◽  
Zhi He ◽  
Xianwen Mao ◽  
T. Alan Hatton ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Continuous Flow ◽  
Grignard Reagents ◽  
Flow Synthesis
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